United States. Department of the Treasury. "Customs Philippine Commodities, April 9, 1942," in United States. Department of the Treasury. "Volume 41," Press Releases of the United States Department of the Treasury (April 7, 1942 - June 10, 1942) : 50-51. https://fraser.stlouisfed.org/title/6111/item/586884/toc/561090 , accessed on March 28, 2024.